Preparation is what you are actually paying for
The paint is the cheapest part of a paint job and the part that fails last. Almost every early failure traces back to something that was skipped before the first coat went on.
4 min read
Paint does not stick to problems
A coating is a film. It bonds to whatever it is applied to, and it inherits that surface's problems rather than solving them. Applied over dust, it bonds to dust. Applied over salt, it bonds to salt. Applied over paint that is already lifting, it lifts with it.
That is the whole principle, and almost every early failure follows from it. When a repaint fails in a year, it is rarely because the paint was bad. It is because it was asked to stick to something that was never going to hold it.
What preparation actually involves
Washing comes first, and it is not a rinse. Surfaces collect grime, and exterior surfaces near the water collect salt as well. A wall can look clean and still have enough on it to stop a coating bonding properly.
Then removal: anything loose, lifting, flaking or blistered has to come off. This is the step that gets skipped most, because it is slow and because a fresh coat hides the evidence for a while.
Then making good — filling, patching, and repairing cracked or damaged substrate — and then sanding that back flat, which is what stops a repair reading as a bump under the finish. Then priming or sealing anything bare, absorbent or newly repaired, so the topcoat goes onto a consistent surface rather than a patchwork.
Only then does the first topcoat go on. On a house in poor condition, that sequence is genuinely the majority of the labour.
Filling a crack is not fixing a crack
Older houses settle, and settlement cracks move with the seasons. Filler on its own moves with them until it splits again along exactly the same line — which is why so many people find the same crack reappearing after every repaint.
Doing it properly usually means cutting the crack out to something sound, filling it in a way that can accommodate movement, and sometimes reinforcing across it so the movement is spread rather than concentrated at one line. It costs more than a tube of filler and it is the only version that stays gone.
If a quote covers a house with visible cracking and says nothing about how the cracks will be treated, that is worth asking about before you sign it.
Bare timber has a clock on it
Once timber is stripped back or newly exposed, it starts weathering immediately. Left bare through sun and rain, the surface degrades and the first coat that goes over it later has less to hold on to.
The same applies to end grain — the cut ends of boards, the tips of barge boards, the ends of a finial. End grain absorbs water far faster than the face of the timber does, and it is where exterior coatings most often start lifting. Sealing those cuts is a small job that gets skipped constantly and is worth a great deal.
Preparation is where lead paint matters
Anything built before the 1970s can carry lead-based paint under its later coats, and the risk is not in the paint sitting on the wall — it is in how it is removed. Dry sanding and heat stripping are the methods that turn a stable surface into dust and fumes.
The sensible working assumption on older stock is that it is present until it is ruled out. In practice that changes the preparation method rather than whether the job can be done: no dry sanding on suspect surfaces, dust kept down, debris contained and cleaned up as work proceeds.
If a surface genuinely needs full removal rather than sound preparation, that is specialist work — and a painter should tell you that rather than take it on.
How to tell whether it is in your quote
Look for verbs. A quote that says what will be washed, removed, filled, sanded and primed is describing a process. A quote that names a product and a number of coats is describing a shopping list.
Ask what happens if more damage is found once the old coating comes off, because on older houses it often is. A good answer is a clear one — that you will be told, shown, and given the choice — not silence, and not a promise that nothing will change.
The uncomfortable truth is that a thorough quote frequently looks more expensive than a thin one for the same house. The difference is that one of them is the actual price of the job.